Puppy Spam?

Has anyone else been getting emails that are ostensibly from someone who needs to rehome a litter of bulldog puppies because of family problems? We've had several, with slightly different variations on the story, and are wondering whether they're some kind of scam. Bulldogs are a comparatively rare breed and it would be very surprising to have several owners who'd bred one litter having family disasters in quick succession. Actually it would be surprising if a genuine breeder of pedigree bulldogs wasn't already in contact with other breed enthusiasts —the owner of the puppies' father, for starters — who would be able and willing to take on the job of placing the pups. 

Possible motivations might be:

• They're spam adverts targeted at anyone with an animal-related web page from someone who's breeding bulldogs commercially but wants to give the impression that these are puppies reared in a domestic home. 

• They're some kind of advance-fee fraud - hoping to get a payment before puppies are delivered.

• They're not actually anything to do with dogs, and they're simply trying to provoke a response to verify that they've harvested a live email address.